2123450317 has 4 divisors (see below), whose sum is σ = 2235210880. Its totient is φ = 2011689756.

The previous prime is 2123450309. The next prime is 2123450323. The reversal of 2123450317 is 7130543212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2123450317 - 2³ = 2123450309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123450327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55880253 + ... + 55880290.

It is an arithmetic number, because the mean of its divisors is an integer number (558802720).

Almost surely, 2^2123450317 is an apocalyptic number.

It is an amenable number.

2123450317 is a deficient number, since it is larger than the sum of its proper divisors (111760563).

2123450317 is a wasteful number, since it uses less digits than its factorization.

2123450317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111760562.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 2123450317 is about 46080.9105487294. The cubic root of 2123450317 is about 1285.3281960832.

Adding to 2123450317 its reverse (7130543212), we get a palindrome (9253993529).

The spelling of 2123450317 in words is "two billion, one hundred twenty-three million, four hundred fifty thousand, three hundred seventeen".